<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <script>
        const ul = [
            {
                name: 'li', content: 'li1',
                // len: '4',
                ul: [
                    { name: 'li', content: 'li11' },
                    { name: 'li', content: 'li12' },
                    { name: 'li', content: 'li13' },
                    { name: 'li', content: 'li14' },
                ]
            },
            {
                name: 'li', content: 'li2',
                // len: '3',
                ul: [
                    { name: 'li', content: 'li21' },
                    { name: 'li', content: 'li32' },
                    { name: 'li', content: 'li43' },
                ]
            },
            { name: 'li', content: 'li3' },
        ]


    </script>
</body>

</html>